boost_1_45_0/libs/spirit/example/lex/example.hpp

//  Copyright (c) 2001-2010 Hartmut Kaiser
//  Copyright (c) 2001-2007 Joel de Guzman
// 
//  Distributed under the Boost Software License, Version 1.0. (See accompanying 
//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include <iostream>
#include <fstream>
#include <string>

///////////////////////////////////////////////////////////////////////////////
//  Helper function reading a file into a string
///////////////////////////////////////////////////////////////////////////////
inline std::string 
read_from_file(char const* infile)
{
    std::ifstream instream(infile);
    if (!instream.is_open()) {
        std::cerr << "Couldn't open file: " << infile << std::endl;
        exit(-1);
    }
    instream.unsetf(std::ios::skipws);      // No white space skipping!
    return std::string(std::istreambuf_iterator<char>(instream.rdbuf()),
                       std::istreambuf_iterator<char>());
}